Greetings,
Not a frequent poster but been on the list for many years. I have a 2009 CVO S/E Roadglide, orange and black, best looking Harley I've ever owned and in 40 years of riding HD i've owned a bunch. I love this bike and I plan to keep it for a long time. Having said that this is without a doubt the worst HD i've ever owned as far as the motor goes.
It has made rocker box/valve train noise ever since it was new. I had a hot rod 95in in my previous Roadglide so I was familiar with the typical twin cam rattle so I just put louder mufflers on it.

At 36k I am on my 4th compensator and I'm not sure about the one that is in it now even though it has the S/E version with the glue on plastic parts in the primary cover.
We got home from a 8 day, 2400 mile trip around Lake Superior in September when I thought it was making more noise than usual. My first thought was that the lifters had taken a dump like so many other's on this list have experienced. It was indeed a lifter which of course ruined the cam. I, like any red blooded American man, used this as a excuse to up grade to the HD 117 kit. I'm going to stick with the HD cam but I did purchase S&S lifters like most folks around here recommend.
I would add that for the last 13yrs I have worked at two different HD Dealers so this bike has been meticulously maintained and always had Redline oil used in it. To be transparent I did put a 30 tooth sprocket, Fullsack baffles and a Mastertune tuner on it. No converter either. I just think, as do many others, that there is some inherent design flaws in the twin cam motor and do not get me started on the shocks and forks.
I retired, again, in May as my dealership had a new owner who does not believe in vacations in the summer. But the mechanic there is fixing the old girl. Fingers crossed.
As a side bar I promised the sales staff that I was going to buy a second bike and it was not going to be a HD. After scaring the dog chit out of myself on a Ducati XDiavel S I bought a 2016 BMW R1200RT. It is a blast to ride. not as comfortable as the Roadglide but it certainly out handles it. About 200 pounds lighter to so it's like riding a scooter. Sure is nice to have though while the Roadglide is on a lift at the shop. Especially when Ohio had a string of 70 degree days in November.
Just my two cents worth. Love my bike but any motorcycle should go well past 36,000 miles when maintained as well as this one has.
Flame on.